发明名称 |
Recording and reproducing method for optical information recording medium and optical information recording medium |
摘要 |
Tracking control is carried out by a push-pull method or by mechanical feed at the time of recording signals, and tracking control is carried out by a phase difference tracking method at the time of reproduction. Thus, a phase change type optical disk which enables phase difference reproduction and is erasable may be realized. In a phase change type optical disk having a phase difference reproduction structure, servo mechanism at the time of reproducing signals may be stably controlled by causing the reflectance of a blank portion to be higher than the reflectance of a recording mark portion.
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申请公布号 |
US6587420(B1) |
申请公布日期 |
2003.07.01 |
申请号 |
US19990319325 |
申请日期 |
1999.06.03 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
NAGATA KEN'ICHI;YAMADA NOBORU;AKAHIRA NOBUO;NISHIUCHI KENICHI |
分类号 |
G11B7/007;G11B7/09;G11B7/24;G11B7/24079;G11B7/243;G11B7/246;G11B7/254;G11B7/257;G11B7/258;G11B7/2595;(IPC1-7):G11B7/00 |
主分类号 |
G11B7/007 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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